gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2020-11-1-0465gtcrust-987Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSВОЗРАСТНЫЕ РУБЕЖИ ПРОЯВЛЕНИЯ РАННЕПАЛЕОЗОЙСКОГО ГРАНИТОИДНОГО МАГМАТИЗМА ЦЕНТРАЛЬНОЙ ЧАСТИ БУРЕИНСКОГО КОНТИНЕНТАЛЬНОГО МАССИВА ЦЕНТРАЛЬНО-АЗИАТСКОГО СКЛАДЧАТОГО ПОЯСАAGE OF THE EARLY PALEOZOIC GRANITOID MAGMATISMIN THE CENTRAL PART OF THE BUREYA CONTINENTAL MASSIF, CENTRAL ASIAN FOLD BELThttps://orcid.org/0000-0003-0169-6460ОвчинниковР. О.OvchinnikovR. O.

РОМАН ОЛЕГОВИЧ ОВЧИННИКОВ м.н.с.

675000, г. Благовещенск, пер. Рёлочный, 1, Россия

ROMAN O. OVCHINNIKOV Junior Researcher

1 Relochniy Ln, Blagoveschensk 675000, Russia

ovchinnikov@ignm.ruhttps://orcid.org/0000-0002-8879-5412СорокинА. А.SorokinA. A.

АНДРЕЙ АНАТОЛЬЕВИЧ СОРОКИН докт. геол.-мин. наук, чл.-корр. РАН, зав. лабораторией, директор

675000, г. Благовещенск, пер. Рёлочный, 1, Россия

ANDREY A. SOROKIN Doctor of Geology and Mineralogy, Corresponding Member of RAS, Head of laboratory, Director

1 Relochniy Ln, Blagoveschensk 675000, Russia

sorokin@ascnet.ruhttps://orcid.org/0000-0003-0918-0995КудряшовН. М.KudryashovN. M.

НИКОЛАЙ МИХАЙЛОВИЧ КУДРЯШОВ канд. геол.-мин. наук, в.н.с.

184209, г. Апатиты, ул. Ферсмана 14, Россия

NIKOLAI M. KUDRYASHOV Candidate of Geology and Mineralogy, Leading Researcher

14 Fersman St, Apatity 184209, Russia

nik@geoksc.apatity.ruhttps://orcid.org/0000-0002-2027-7256КовачВ. П.KovachV. P.

ВИКТОР ПЕТРОВИЧ КОВАЧ канд. геол.-мин. наук, с.н.с.

199034, Санкт-Петербург, наб. Макарова, 2, Россия

VICTOR P. KOVACH Candidate of Geology and Mineralogy, Senior Researcher

2 Makarova Emb, Saint Petersburg 199034, Russia

v.p.kovach@gmail.comhttps://orcid.org/0000-0001-6171-6051ПлоткинаЮ. В.PlotkinaJ. V.

ЮЛИЯ ВЛАДИМИРОВНА ПЛОТКИНА канд. геол.-мин. наук, с.н.с.

199034, Санкт-Петербург, наб. Макарова 2, Россия

JULIA V. PLOTKINA Candidate of Geology and Mineralogy, Senior Researcher

2 Makarova Emb, Saint Petersburg 199034, Russia

jplotkina@yandex.ruhttps://orcid.org/0000-0003-0824-0220СковитинаТ. М.SkovitinaT. M.

ТАТЬЯНА МИХАЙЛОВНА СКОВИТИНА канд. геол.-мин. наук, с.н.с.

664033, г. Иркутск, ул. Лермонтова 128, Россия

TATIANA M. SKOVITINA Candidate of Geology and Mineralogy, Senior Researcher

128 Lermontov St, Irkutsk 664033, Russia

skovit@crust.irk.ruИнститут геологии и природопользования Дальневосточного отделения РАНРоссияInstitute of Geology and Nature Management, Far East Branch of RASRussian FederationГеологический институт Кольского научного центра РАНРоссияInstitute of Geology, Kola Scientific Centre of RASRussian FederationИнститут геологии и геохронологии докембрия РАНРоссияInstitute of Precambrian Geology and Geochronology RASRussian FederationИнститут земной коры Сибирского отделения РАНРоссияInstitute of the Earth’s Crust, Siberian Branch of RASRussian Federation20201903202011189106Copyright © Овчинников Р.О., Сорокин А.А., Кудряшов Н.М., Ковач В.П., Плоткина Ю.В., Сковитина Т.М., 20202020Овчинников Р.О., Сорокин А.А., Кудряшов Н.М., Ковач В.П., Плоткина Ю.В., Сковитина Т.М.Ovchinnikov R.O., Sorokin A.A., Kudryashov N.M., Kovach V.P., Plotkina J.V., Skovitina T.M.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/987

Представлены новые данные о возрасте «ключевых» раннепалеозойских магматических комплексов центральной части Буреинского континентального массива Центрально-Азиатского складчатого пояса. Показано, что возраст порфиробластических кварцевых монцонитов кивилийского комплекса составляет 453±2 млн лет, а гнейсовидных гранитов суларинского комплекса – около 481 млн лет. Результаты Sm-Nd изотопных исследований свидетельствуют о том, что позднеордовикские кварцевые монцониты образовались преимущественно за счет коровых источников, обладающих палеопротерозойскими Nd модельными изотопными возрастами. В формировании кембрийских гранитов принимали участие как древний (палеопротерозойский?), так и более молодой источник. Полученные данные, а также опубликованные ранее материалы указывают на проявление нескольких этапов раннепалеозойского магматизма в истории формирования Буреинского континентального массива, а именно ~ 541, ~504–500, ~487, ~474, ~453 млн лет. По близкому сценарию развивался раннепалео­зойский магматизм и в пределах Цзямусинского континентального массива. Наряду с синхронностью проявления неопротерозойского магматизма в пределах указанных континентальных массивов данное обстоятельство свидетельствует о их общей геологической истории.

The article presents new age data on the ‘key’ Early Paleozoic igneous complexes located in the central part of the Bureya continental massif of the Central Asian Fold Belt. Porphyroblastic quartz monzonites of the Kivili complex are dated to 453±2 Ma. The age of gneissic granites of the Sularin complex is ~481 Ma. The Sm-Nd isotope stu­dies show that Late Ordovician quartz monzonites were formed mainly from crustal sources with Paleoproterozoic Nd model isotopic ages. Both ancient (Paleoproterozoic?) and younger sources were involved in the formation of Cambrian granites. Our data, as well as previously published materials, suggest several stages of the Early Paleozoic magmatism in the evolution of the Bureya continental massif: ~541, ~504–500, ~487, ~474 and ~453 Ma. Early Paleozoic magmatism developed under a similar scenario in the Jiamusi continental massif. In addition to the synchronism of Neoproterozoic magmatism within these continental massifs, this feature testifies to their common geological history.

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The authors declare that there are no conflicts of interest present.